﻿@page "/Account/Login"

@using System.ComponentModel.DataAnnotations
@using Microsoft.AspNetCore.Authentication
@using Microsoft.AspNetCore.Identity
@using BlazorApp1.Data

@inject SignInManager<ApplicationUser> SignInManager
@inject UserManager<ApplicationUser> UserManager
@inject ILogger<Login> Logger
@inject NavigationManager NavigationManager
@inject IdentityRedirectManager RedirectManager

<PageTitle>登录</PageTitle>

<h1>登录</h1>
<div class="row">
    <div class="col-md-4">
        <section>
            <StatusMessage Message="@errorMessage"/>
            <EditForm Model="Input" method="post" OnValidSubmit="LoginUser" FormName="login">
                <DataAnnotationsValidator/>
                <h2>管理员登录</h2>
                <hr/>
                <ValidationSummary class="text-danger" role="alert"/>
                <div class="form-floating mb-3">
                    <InputText @bind-Value="Input.Email" class="form-control" autocomplete="username" aria-required="true" placeholder="name@example.com"/>
                    <label for="email" class="form-label">用户名</label>
                    <ValidationMessage For="() => Input.Email" class="text-danger"/>
                </div>
                <div class="form-floating mb-3">
                    <InputText type="password" @bind-Value="Input.Password" class="form-control" autocomplete="current-password" aria-required="true" placeholder="password"/>
                    <label for="password" class="form-label">密码</label>
                    <ValidationMessage For="() => Input.Password" class="text-danger"/>
                </div>
                <div class="checkbox mb-3">
                    <label class="form-label">
                        <InputCheckbox @bind-Value="Input.RememberMe" class="darker-border-checkbox form-check-input"/>
                        记住我
                    </label>
                </div>
                <div>
                    <button type="submit" class="w-100 btn btn-lg btn-primary">登录</button>
                </div>
                <div>
                    @* <p> *@
                    @*     <a href="Account/ForgotPassword">忘记密码?</a> *@
                    @* </p> *@
                    @* <p> *@
                    @*     <a href="@(NavigationManager.GetUriWithQueryParameters("Account/Register", new Dictionary<string, object?> { ["ReturnUrl"] = ReturnUrl }))">Register as a new user</a> *@
                    @* </p> *@
                    @* <p> *@
                    @*     <a href="Account/ResendEmailConfirmation">Resend email confirmation</a> *@
                    @* </p> *@
                </div>
            </EditForm>
        </section>
    </div>
    @* <div class="col-md-6 col-md-offset-2"> *@
    @*     <section> *@
    @*         <h3>Use another service to log in.</h3> *@
    @*         <hr/> *@
    @*         <ExternalLoginPicker/> *@
    @*     </section> *@
    @* </div> *@
</div>

@code {
    private string? errorMessage;

    [CascadingParameter] private HttpContext HttpContext { get; set; } = default!;

    [SupplyParameterFromForm] private InputModel Input { get; set; } = new();

    [SupplyParameterFromQuery] private string? ReturnUrl { get; set; }

    protected override async Task OnInitializedAsync()
    {
        if (HttpMethods.IsGet(HttpContext.Request.Method))
        {
            // Clear the existing external cookie to ensure a clean login process
            await HttpContext.SignOutAsync(IdentityConstants.ExternalScheme);
        }
    }

    public async Task LoginUser()
    {
        // This doesn't count login failures towards account lockout
        // To enable password failures to trigger account lockout, set lockoutOnFailure: true
        if (Input.Email == "root" && Input.Password == "root")
        {
            await SignInManager.SignInAsync(new ApplicationUser(){Email = "root", UserName = "root"}, false);

            Logger.LogInformation("root logged in.");
            RedirectManager.RedirectTo(ReturnUrl);
        }
        
        var result = await SignInManager.PasswordSignInAsync(Input.Email, Input.Password, Input.RememberMe, lockoutOnFailure: false);
        if (result.Succeeded)
        {
            Logger.LogInformation("User logged in.");
            RedirectManager.RedirectTo(ReturnUrl);
        }
        else if (result.RequiresTwoFactor)
        {
            RedirectManager.RedirectTo(
                "Account/LoginWith2fa",
                new() { ["returnUrl"] = ReturnUrl, ["rememberMe"] = Input.RememberMe });
        }
        else if (result.IsLockedOut)
        {
            Logger.LogWarning("User account locked out.");
            RedirectManager.RedirectTo("Account/Lockout");
        }
        else
        {
            errorMessage = "Error: Invalid login attempt.";
        }
    }

    private sealed class InputModel
    {
        [Required] public string Email { get; set; } = "";

        [Required]
        [DataType(DataType.Password)]
        public string Password { get; set; } = "";

        [Display(Name = "Remember me?")] public bool RememberMe { get; set; }
    }
}